ANSI PH4.225-1990
Photography (Processing Chemicals) - Sodium Hydroxide

Standard No.

ANSI PH4.225-1990

Release Date

1990

Published By

American National Standards Institute （ANSI)

Latest

ANSI PH4.225-1990

Scope

Establishes criteria for the purity of photographic grade sodium hydroxide and describes the tests used to determine the purity.

ANSI PH4.225-1990 history

• 1990 ANSI PH4.225-1990 Photography (Processing Chemicals) - Sodium Hydroxide